import java.util.Objects;

public class Person {
    private String name;
    private int age;

    public Person() {
        // 默认构造器
    }

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    private void sayHello(String prefix) {
        System.out.println(prefix + ", I am " + name + ", " + age + " years old.");
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Deprecated
    public void legacyMethod() {
        System.out.println("This method is deprecated.");
    }

    @Override
    public String toString() {
        return "Person{name='" + name + "', age=" + age + '}';
    }

    @Override
    public boolean equals(Object o) {
        if (this == o)
            return true;
        if (!(o instanceof Person))
            return false;
        Person person = (Person) o;
        return age == person.age && Objects.equals(name, person.name);
    }

    @Override
    public int hashCode() {
        return Objects.hash(name, age);
    }
}